<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./css/index.css">
    <title>17-增加菜单效果</title>
</head>

<body>
    <div class="cont">
        <input type="checkbox" name="ra" id="ra">
        <div class="navbox">
            <label for="ra">
                <div class="nav_icon">
                    <img src="./images/plus.png" alt="">
                </div>
            </label>
            <div class="icon a"></div>
            <div class="icon b"></div>
            <div class="icon c"></div>
            <div class="icon d"></div>
        </div>
    </div>
</body>

</html>